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HDBR versus HDBR + CO2 FW change. (a) In comparison to the HDBR group, the HDBR + CO2 group showed greater FW decreases in the areas marked in blue (P = 0.05, FWE corrected). (b) The average FW percentage change in the peak voxel of the largest cluster (Cerebellum: MNI coordinate 11, −62, −17) in the HDBR and HDBR + CO2 groups. The left side of the image corresponds with the left hemisphere of the brain. L: Left, R: Right.
